<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style type="text/css">
        .father{
            width: 800px;
            border: 1px solid black;
            position: relative;
       }
        .son1,.son4{
            width: 780px;
            height: 100px;
            background-color: skyblue;
            margin: 10px;
        }
        .son2{
            width: 595px;
            height: 400px;
            background-color: hotpink;
            margin: 0 10px;
            
        }
        .son3{
            width: 175px;
            height: 400px;
            right: 10px;
            left: 615px;
            top: 120px;
            position: absolute;
            background-color: hotpink;
        }   
    </style>
</head>
<body>
    <div class="father">
            <div class="son1"></div>
            <div class="son2"></div>
            <div class="son3"></div>
            <div class="son4"></div>
            <div class="clear"></div>
    </div>
</body>
</html>